Objective: 3.04
 Thinking Skill: Analyzing
Use variables to describe numerical expressions and relationships.
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Question: 14
I am an odd number. When I am tripled, I am one more than 20. Which number sentence identifies the odd number, n?
A 3 × n - 1= 20
B 3 × n + 1 = 20
C 2 × n - 20 = 1
D 3 × n + 20 = 1